Shaker conveyer



March 28, 1939. T. G. NYBORG SHAKER CONVEYER Filed March 24, 193'7 3 Sheets-Sheet l March 28, 1939. 17. G. NYBORG SHAKER CONVEYER F ilved March 24, 1937 5 Sheets-Sheet 3 Fig. 3.

ATTOR/VE Y F same inclination as the wedges.

screws I6 and I! is such that they are just out of contact with the shoes Iii, It when the wedge abutments I2, M are in operative position.

Means are provided to allow of the withdrawal of the wedge abutment l2, by an operator. Such means comprise a flat plate I8 pivoted at 19 to the telescopic trough and connected to the wedge 12 by a link 29. A spring pressed piston 2! presses against the plate It so as to maintain the wedge l2 in the operative position. A rope or the like 22 is connected to the plate l8 by means of a shackle 23 and is led away to a position easily accessible to the man responsible for the shovel loading. Similar means are provided for Withdrawing the wedge Hi.

When it is desired to have the shovel trough l rigidly clamped to the telescopic trough 2 and moving with it on both forward and return strokes of the conveyer, both wedge abutments i2 and M are in position. When the trough line begins its return stroke, the wedge abutment l2 strikes the shoe I9 and moves it over slightly to clamp the bar El and thus move the shovel trough l in the same direction as the conveyer. At the start i of the forward or conveying stroke, the other wedge abutment Hi strikes the other shoe Id and moves it over to lock the shoes H1, H3 on to the bar 9 and thus move the shovel trough l in the forward direction of the conveyer stroke. It will be appreciated that the movement to clamp or unclamp is very small and thus the lost motion bet-ween the shovel and telescopic troughs is small.

When it is desired to advance the shovel trough I, as for example into a heap of coal, the wedge abutment l4 which would otherwise come into contact with the shoe ill on the forward stroke of the conveyer, is withdrawn by means of the associated lever plate It and rope 22 clamp then operates on the return stroke of the conveyer but is free on the conveying stroke.

When it is desired to retract the shovel trough the wedge abutment l2, which would otherwise come into contact with the shoe IE) on the return stroke of the conveyer clamp then operates on the conveying stroke but is free on the return stroke.

The appropriate wedge is, in each case, withdrawn during the period when it is not under load, that is the wedge !2 during the conveying stroke and the wedge M during the return stroke.

The abutment l3 operating the shoe I!) on the return stroke of the conveyer is loaded by means of spring piston 24 so that if the shovel strikes some large or solid object damage to the troughing is avoided. When the resistance to forward motion of the shovel exceeds the spring load, the abutment I3 moves backwards and the set screw abutment H strikes the shoe Ill and releases the clamp.

The wedge abutment IB is made adjustable by means of a set screw 25 to allow for wear of the shoes H3 and I0. 7

A modified form of the clamping means is shown in Fig. l. The shoes l0, l0 grip the bar 9 when the link member III is displaced angularly. iressure to displace the link I I is applied directly to the ends of the link I! from the abutments 33 or 5 through the wedge abutments E2 or M and through members 38 or 3! respectively. These members 36 and iii are slidable in grooves formed in the shoes faces which engage the wedges tapered to the Similarly the and the r is withdrawn and the.

IE and Hi, and have the I abutments l6 and IT engage the ends of the link ll through members 32 and 33 also slidable in the shoes Hi and Ill.

The spring pressed piston 2| bearing on the plate l8 may be in this form arranged parallel to the line of the conveyer instead of at right angles thereto as shown in Fig. 2.

The length of the telescopic trough 2 is preferably such that the difierence in advance between the inner and outer positions of the shovel is more than the length of a standard trough, so that the shovel trough E can be extended to its full extent and the telescopic clamp moved up leaving sufiicient space for the insertion of a standard trough.

It will be understood that the invention is not restricted to the details of the preferred forms described above but that it includes such modifications as come within the broad idea underlying the invention.

I claim:

1, In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising a longitudinal bar rigidly connected to one of these sections, shoes arranged on each side of the longitudinal bar, an inclined member embracing the shoes, fixed abutments carried by the other section, removable abutment members between the fixed abutments and the inclined member pressing eccentrically upon the incline-d member during movement of the conveyer so as to vary its angularity and move the shoes to clamp the bar and means for selectively rendering the removable abutment members inoperative during the forward and backward stroke of the conveyer respectively.

2. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising a longitudinal bar rigidly connected to one of these sections, shoes arranged on each side of the longitudinal bar, an inclined member embracing the shoes, fixed abutments carried by the other section, removable abutment members between the fixed abutments and the shoes pressing upon the shoes during movement of the conveyer so as to vary the angularity of the inclined member and move the shoes to clamp the bar and means for selectively rendering the removable abutment members inoperative during the forward and the backward stroke of the conveyer respectively.

3. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising a longitudinal bar rigidly connected to one of these sections, a pair of shoes arranged one on each side of this bar, an inclined member embracing these shoes, fixed abutments carried by the other section and arranged one at each end of each shoe, a' removable abutment member between one of said shoes and one of said fixed abutments, a second removable abutment member between the other of said shoes and the fixed abutment at the end of this shoe remote from the first mentioned removable abutment member, said first mentioned removable abutment member transferring pressure from the corresponding fixed abutment to the shoe to increase the angularity of the inclined member and cause the shoes to grip the longitudinal bar during the forward stroke of the conveyer, said second mentioned removable abutment member transferring pressure from the corresponding fixed abutment to the shoe to increase the angularity of the inclined member and cause the shoes to grip the longitudinal bar during the backward stroke of the conveyer, and means for selectively removing the removable abutment members to render the clamping means inoperative during the corresponding stroke of the conveyer.

4. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising a longitudinal bar rigidly connected to one of these sections, a pair of shoes arranged one on each side of this bar, an inclined member embracing these shoes, fixed abutments carried by the other section and arranged one at each end of each shoe, a removable abutment member between one of said shoes and one of said fixed abutments, a second removable abutment member between the other of said shoes and the fixed abutment at the end of this shoe remote from the first mentioned removable abutment member, said second-mentioned fixed abutment member being springloaded and arranged to move in the forward direction of the conveyer under abnormal load, said first mentioned removable abutment member transferring pressure from the corresponding fixed abutment to the shoe to increase the angularity of the inclined member and cause the shoes to grip the longitudinal bar during the forward stroke of the conveyer, said second mentioned removable abutment member transferring pressure from the corresponding fixed abutment to the shoe to increase the angularity of the inclined member and cause the shoes togrip the longitudinal bar during the backward stroke of the conveyer and means for selectively removing the removable abutment members to render the clamping means inoperative during the corresponding stroke of the conveyer.

5. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising a longitudinal bar rigidly connected to one of these sections, a pair of shoes arranged one on each side of this bar, an inclined member embracing these shoes, fixed abutments carried by the other section and arranged one at each end of each shoe, a removable abutment member between one of said shoes and one of said fixed abutments, a second removable abutment member between the other of said shoes and the fixed abutment at the end of this shoe remote from the first mentioned removable abutment member, said first mentioned removable abutment member transferring pressure from the corresponding fixed abutment to the shoe to increase the angularity of the inclined member and cause the shoes to grip the longitudinal bar during the forward stroke of the conveyer, said second mentioned removable abutment member transferring pressure from the corresponding fixed abutment to the shoe to increase the angularity of the inclined member and cause the shoes to grip the longitudinal bar during the backward stroke of the conveyer and means comprising bell-crank levers operable from a. position remote from the clamping means for selectively removing the removable abutment members to render the clamping means inoperative during the corresponding stroke of the conveyer.

6. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising a longitudinal bar rigidly connected to one of these sections, clamping elements for the bar, an inclined member embracing the clamping elements, abutment means carried by the other of these sections and automatically operative by slight or incipient relative motion between the sections to apply a load eccentrically to this inclined member so as to increase its angularity and cause it to clamp the elements together and means for rendering the abutment means inoperative during selected movement of the conveyer in either direction.

7. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising clamping means comprising a longitudinal bar rigidly connected to one of these sections, shoes arranged on each side of the longitudinal bar, an inclined member embracing the shoes, fixed abutment means carried by the other of these sections, removable abutment members which on slight or incipient relative motion between the sections transfer a load from the fixed abutment means to the inclined member so as to increase its angularity and move the shoes to clamp the longitudinal bar and means for selectively withdrawing the removable abutment members to render the clamping means inoperative during selected movement of the conveyer in either direction.

8. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relatively to the other comprising clamping means comprising a longitudinal bar rigidly connected to one of these sections, shoes arranged on each side of the longitudinal bar, an inclined member embracing the shoes, fixed abutment means'carried by the other of these sections, one of these fixed abutment means being spring loaded so as to relieve excessive load, removable abutment members which on slight or incipient relative motion between the sections transfer a load from the fixed abutment means to the inclined member so as to increase its angularity and move the shoes to clamp the longitudinal bar and means for selectively withdrawing the removable abutment members to render the clamping means inoperative during selected movement of the conveyer in either direction.

9. In a shaker conveyer comprising two sections in telescopic relation to one another, means for advancing or retracting one of these sections relative to the other comprising an inclined member, abutment means automatically operative by slight or incipient relative motion between the sections to apply a load eccentrically to said inclined member to vary its angularity, means limiting the possible angularity of the inclined member and utilizing a component of the load applied by the abutment means to prevent eiTective relative movement between the sections by clamping action, and means for rendering the abutment means inoperative during selected movement of the conveyer in either direction.

TAGE GEORG NYBORG. 

